JPS6046012A - Attracting and driving device of load - Google Patents

Abstract

PURPOSE:To obtain an attracting and driving device advantageous in noise and damage from seizure and is power-saving by connecting a load to the plunger of solenoid and installing a clock mechanism which prevents return of the plunger to the solenoid after the first attractction and enable return after the second attraction. CONSTITUTION:A solenoid 21 attracts a plunger when a load is attracted. If the current is stopped, the plunger is made to return from the solenoid 21 by the load. In this case, a rotating member 23 is caught in the groove 22a of a shell 22 and the plunger cannot return to the direction of the load. Consequently, it makes the same condition that the load is attracted to the solenoid 22. In the case of returning the load, when the current is applied again to the solenoid 22, the plunger is attracted. In this case, when the rotating member 23 is freed from the groove 22a of the shell 22, the rotating member 23 rotates due to the slope of a sliding member 24 which is pushed by a spring 25. When the current to the solenoid 21 is stopped, the rotating member 23 becomes a state of return from the solenoid 21 due to the load since the rotating member 23 is free from the groove 22a of the shell 22 and can enter into the interior.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a load suction drive device for suction driving a load by a solenoid, such as a solenoid for operating a drain valve of a washing machine.

Conventional example II and its problems Conventionally, a -Nara-type centrifugal dehydrating washing machine has a structure as shown in Fig. 1, in which 1 is an outer tank for receiving washing water, 2 is an outer tank for receiving washing water;
1 is a washing and dehydrating tank provided inside the outside Wi 1, which has a pulsator 3 on the bottom and a large number of small holes 4 for draining water on the side wall. Reference numeral 5 denotes a mechanical case, which has a mechanism for transmitting the driving force of the motor 6 so as to rotate only the pulsator 3 during washing and the washing/spinning 1a2 during spin-drying. Further, the motor 6 transmits driving force to the mechanical case 5 through a belt 7 and a pulley 8. 9 is the drain valve of outside 4!1, 10 is the brake arm, 11 is the drain valve 9 and the brake arm 10
A support plate 12 is provided with an outer tank 1, a motor 6, a mechanical case 5, etc., and these are suspended in an outer tank 14 by a rod 13. 15 is a balancer provided on the upper part of the washing and dewatering machine Ia2, and 16 is a drain hose. Furthermore, using Fig. 2, solenoid 11
Explain the operation. The solenoid 11 is connected to the drain valve 9 via a connecting member 17. There are a brake wheel 18 and a brake band 19 inside the mechanical case 5, and the brake band 19 can be press-contacted to and detached from the brake wheel 18 to perform a braking action. The rotation of the brake wheel 18 is transmitted as a rotational force to the washing and dewatering machine 1e2. That is, when the brake band 19 is pressed against the brake wheel 18, the brake wheel 18 does not rotate, and the washing/drying tub 2 also does not rotate. During washing, the solenoid 11 is not energized, so the drain valve 9 is closed by the force of a built-in spring (not shown) and the brake spring 20. or,
Since the brake wheel 18 is pressed against the brake band 19 and does not rotate, the washing/dehydrating tub 2 does not rotate, and only the pulsator 3 rotates to perform washing. During drainage and dewatering, the solenoid 11 is energized and the plunger 11b of the solenoid 11 is attracted. The connecting member 11 connected thereto will move in the direction of arrow A. Therefore, the drain valve 9 opens (and the brake arm 10 rotates, and the brake band 19 separates from the brake wheel 18, resulting in a dewatering operation).

As mentioned above, washing and dehydrating I! A solenoid 11 is used to open and close the brake device 2 and the drain valve 9.

Looking at the solenoid 11 of a one-tank two-centrifugal washing machine, its required stroke is 10 mm or more, and its weight is the built-in spring of the drain valve 9 and the brake spring 20.
It is quite thick as it is necessary to overcome this. Furthermore, in electric washing machines, electricity is continuously applied for several minutes during draining and spin-drying. Therefore, the solenoid 11 of the electric washing machine must have a large suction force and must be able to considerably suppress the increase in humidity.

There are two types of solenoids: AC solenoids and DC solenoids.As shown in Figure 2, these solenoids are composed of a coil 11a that generates a magnetic field, a plunger 11b that is attracted and moves, and a fixed iron core 11C that is fixed. can be listed as follows. An AC solenoid has an AC value that changes depending on the actance of the coil, and can produce a large suction force with a relatively small coil. However, if a slight gap is created between the plunger 11b and the fixed iron core 11C, a large beat may be generated or a crack may occur. On the other hand, in a DC solenoid, the applied current value hardly changes, so plunge
Even if there is a gap between the plunger 11b and the fixed iron core 11 (i), there is no difference in temperature rise from the normal case, and this is very advantageous against burnout. By inserting VAW!J material into the vacuum cleaner, it is possible to reduce the sound during suction.Although it has the above advantages, it requires a very large amount of coils in order to have a large suction force and suppress the temperature rise. required, and is several times more expensive than an AC solenoid.

As mentioned above, with regard to solenoids such as those used in electric washing machines, DC solenoids are extremely expensive, while AC solenoids can become a noise source and must be provided with protection against burnout. There was a problem.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and provides a suction drive device that is very advantageous in terms of noise and burnout, is inexpensive, and saves power.

Structure of the Invention In order to achieve the above object, the load suction drive device of the present invention uses a solenoid having a plunger that performs a suction operation by energizing a coil, and applies a load to the plunger of this solenoid. l! The solenoid is equipped with a lock 8M tl that closes the return of the plunger after the first suction operation of the plansite and enables the return of the plunger after the second suction operation.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be described with reference to the drawings (Figs. 3 to 5).
The explanation will be based on Figure). In Fig. 3 (8), 21 is a solenoid, 21a is a plunger of the solenoid 21, and the part that protrudes from the solenoid 21 is thin.

Lock components (22 to 24) having slopes and protrusions and a spring 25 are arranged on the outer periphery of the narrow diameter portion 21b.The plunger V 21a is connected to a load via a connecting member 26, and the The lock components are composed of a plunger 21a, a cylindrical outer shell 22, a rotating member 23, a sliding member 24, and a spring 25.The rotating member 23, the sliding member Part 1tA
As shown in FIGS. 4 and 5, 24 has a plurality of protrusions on the outside of the circumference of a cylindrical base material and a slope on one side,
The slopes of both members 23, 24 are arranged facing each other.

Furthermore, the rotating member 23 is inclined in one direction, but the sliding member 24 is inclined in both directions. outer shell 2
There are two grooves 22a at opposing positions on the inner surface of 2.
There is a sliding member 24 inserted therein, and the sliding member 24 cannot rotate due to its protrusion. Therefore, the sliding member 24
slides inside the outer shell 22 as the plunger 21a moves. Furthermore, the spring 25 always keeps the solenoid 2
Force is being applied to the 1st side. The rotating member 23 is the plunger 21
It is sandwiched between the step part a and the sliding member 24. The rotating member 23 can freely rotate when it is removed from the groove 22a of the outer shell 22, but its rotation is controlled by the sliding member 24.

Further, the protruding portion of the rotating member 23 is thicker than the diameter of the groove portion 22a of the outer shell 22 (and once it reaches this portion, it cannot go any deeper).

The operation of the above configuration will be described. During load suction, the solenoid 21 suctions the plunger 21a from the state shown in FIG. 4. After that, when the energization is stopped, the plunge 1721a tries to return from the solenoid 21 due to the load. At this time, as shown in FIG.
It gets caught in the groove 22a of No. 2 and does not return to the load direction any further. Therefore, the load is the same as when the solenoid 22 is attracted.

Next, when the load is restored, the solenoid 22 is passed through again from the state shown in FIG. 5, and the plunge +z21a is brought into the suction state. In this case, as can be seen from FIG. 5C, when the rotating member 23 comes off the groove 22a of the outer shell 22, the rotating member 23 rotates along the slope of the 18-movement member 24 pushed by the spring 25. At this point, when the power to the solenoid 21 is stopped, the rotating member 23 can come out of the groove 22a of the outer shell 22 and enter the inner part, so that the state shown in FIG. 4 due to the load is restored from the solenoid 21.

The above operation is repeated, but looking at the relationship between the load and the solenoid 21, the plunger 21a is attracted by the first energization of the solenoid 21, and even if the energization is stopped, the lock mechanism prevents the plunger 21a and the load. is prevented from returning, and the state is similar to the solenoid suction state. Next, in the second suction operation, the lock *a is released, allowing the plunger 21a and the load to return, and the load enters the return state.

Therefore, due to the lock-IN structure, the suction and holding state is achieved by mechanical force, so that the solenoid 21 only needs to be energized for a very short period of 1 hour. This is very advantageous in terms of burnout and power saving.

Effects of the Invention As described above, according to the present invention, the locking mechanism performs suction and holding, resulting in a power-saving device. Since the solenoid is only energized for a very short time, there is no need to consider the rise in temperature of the coil, and the amount of coils can be drastically reduced, allowing the use of very inexpensive solenoids. Furthermore, since it is only energized for a short period of time, there is no risk of burnout. Therefore, both AC and DC solenoids have advantages. In particular, when an inexpensive DC solenoid is used, it is very effective against noise such as suction noise and humming noise.

[Brief explanation of drawings]

Figure 1 shows the conventional dehydration washing iWt! A longitudinal sectional view of I, Figure 2 is a partially cutaway plan view of the vicinity of the solenoid, and Figures 3 to 5.
The figures show an embodiment of the present invention, in which FIG. 3 is a partially cutaway perspective view, FIG. 4A is a Y-Y sectional view of FIG. 5A, FIG. 5A is a longitudinal sectional view showing the suction lock state, and FIG.
-X' r plane view, and the same figure C is a Y'-Y' sectional view of FIG. 5A. 21...Solenoid, 21a...Plunger, 22
... Outer shell, 23 ... Rotating member, 24 ... Sliding part I
, 25... Spring, 2G... Connecting member agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 3 f Figure 4 (73) (A) f

Claims (1)

[Claims] 1. A solenoid having a plunger that performs a suction operation when a coil is energized is provided, a load is connected to the plunger of this solenoid, and the solenoid prevents the plunger from returning after the first suction operation of the plunger. . A load suction drive device comprising a locking mechanism that enables the return after the second suction operation.